Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 2 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/09/2021   22:10:37   (  -0.44,-127.57) (  -1.23,-130.98)  389.33                80
 02/10/2021   21:49:14   (  -0.42,-127.61) (  -0.15,-126.46)  131.25                80
 02/12/2021   10:13:41   (   0.45,-127.64) (   1.36,-131.73)  465.44                80
 02/13/2021   09:52:17   (   0.44,-127.68) (   0.33,-127.20)   55.01                80
 02/15/2021   21:58:09   (  -0.45,-127.82) (  -0.47,-127.98)   17.91                80
 02/18/2021   10:01:11   (   0.46,-127.88) (   0.66,-128.71)   94.83                80
 02/19/2021   09:39:47   (   0.45,-127.92) (  -0.37,-124.19)  425.16                80
 02/20/2021   22:04:23   (  -0.48,-128.00) (  -0.79,-129.49)  169.46                80
 02/21/2021   21:42:59   (  -0.47,-128.03) (   0.24,-124.96)  350.30                80